^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Request key authorisation token key definition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Written by David Howells (dhowells@redhat.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * See Documentation/security/keys/request-key.rst
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <keys/request_key_auth-type.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static int request_key_auth_preparse(struct key_preparsed_payload *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static void request_key_auth_free_preparse(struct key_preparsed_payload *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static int request_key_auth_instantiate(struct key *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct key_preparsed_payload *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static void request_key_auth_describe(const struct key *, struct seq_file *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static void request_key_auth_revoke(struct key *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static void request_key_auth_destroy(struct key *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static long request_key_auth_read(const struct key *, char *, size_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * The request-key authorisation key type definition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct key_type key_type_request_key_auth = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) .name = ".request_key_auth",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .def_datalen = sizeof(struct request_key_auth),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .preparse = request_key_auth_preparse,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .free_preparse = request_key_auth_free_preparse,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .instantiate = request_key_auth_instantiate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .describe = request_key_auth_describe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .revoke = request_key_auth_revoke,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .destroy = request_key_auth_destroy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .read = request_key_auth_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int request_key_auth_preparse(struct key_preparsed_payload *prep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static void request_key_auth_free_preparse(struct key_preparsed_payload *prep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Instantiate a request-key authorisation key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static int request_key_auth_instantiate(struct key *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct key_preparsed_payload *prep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) rcu_assign_keypointer(key, (struct request_key_auth *)prep->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Describe an authorisation token.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static void request_key_auth_describe(const struct key *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct seq_file *m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct request_key_auth *rka = dereference_key_rcu(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (!rka)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) seq_puts(m, "key:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) seq_puts(m, key->description);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (key_is_positive(key))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) seq_printf(m, " pid:%d ci:%zu", rka->pid, rka->callout_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * Read the callout_info data (retrieves the callout information).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * - the key's semaphore is read-locked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static long request_key_auth_read(const struct key *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) char *buffer, size_t buflen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct request_key_auth *rka = dereference_key_locked(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) size_t datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (!rka)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return -EKEYREVOKED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) datalen = rka->callout_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ret = datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* we can return the data as is */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (buffer && buflen > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (buflen > datalen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) buflen = datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) memcpy(buffer, rka->callout_info, buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static void free_request_key_auth(struct request_key_auth *rka)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (!rka)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) key_put(rka->target_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) key_put(rka->dest_keyring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (rka->cred)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) put_cred(rka->cred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) kfree(rka->callout_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) kfree(rka);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * Dispose of the request_key_auth record under RCU conditions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static void request_key_auth_rcu_disposal(struct rcu_head *rcu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct request_key_auth *rka =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) container_of(rcu, struct request_key_auth, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) free_request_key_auth(rka);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * Handle revocation of an authorisation token key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * Called with the key sem write-locked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static void request_key_auth_revoke(struct key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct request_key_auth *rka = dereference_key_locked(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) kenter("{%d}", key->serial);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) rcu_assign_keypointer(key, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) call_rcu(&rka->rcu, request_key_auth_rcu_disposal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * Destroy an instantiation authorisation token key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static void request_key_auth_destroy(struct key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct request_key_auth *rka = rcu_access_pointer(key->payload.rcu_data0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) kenter("{%d}", key->serial);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (rka) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) rcu_assign_keypointer(key, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) call_rcu(&rka->rcu, request_key_auth_rcu_disposal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * Create an authorisation token for /sbin/request-key or whoever to gain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * access to the caller's security data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct key *request_key_auth_new(struct key *target, const char *op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) const void *callout_info, size_t callout_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct key *dest_keyring)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct request_key_auth *rka, *irka;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) const struct cred *cred = current_cred();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct key *authkey = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) char desc[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) kenter("%d,", target->serial);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /* allocate a auth record */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) rka = kzalloc(sizeof(*rka), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (!rka)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) rka->callout_info = kmemdup(callout_info, callout_len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (!rka->callout_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) goto error_free_rka;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) rka->callout_len = callout_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) strlcpy(rka->op, op, sizeof(rka->op));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /* see if the calling process is already servicing the key request of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * another process */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (cred->request_key_auth) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /* it is - use that instantiation context here too */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) down_read(&cred->request_key_auth->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /* if the auth key has been revoked, then the key we're
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * servicing is already instantiated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (test_bit(KEY_FLAG_REVOKED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) &cred->request_key_auth->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) up_read(&cred->request_key_auth->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) ret = -EKEYREVOKED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) goto error_free_rka;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) irka = cred->request_key_auth->payload.data[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) rka->cred = get_cred(irka->cred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) rka->pid = irka->pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) up_read(&cred->request_key_auth->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /* it isn't - use this process as the context */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) rka->cred = get_cred(cred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) rka->pid = current->pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) rka->target_key = key_get(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) rka->dest_keyring = key_get(dest_keyring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* allocate the auth key */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) sprintf(desc, "%x", target->serial);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) authkey = key_alloc(&key_type_request_key_auth, desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) cred->fsuid, cred->fsgid, cred,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) KEY_POS_VIEW | KEY_POS_READ | KEY_POS_SEARCH | KEY_POS_LINK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) KEY_USR_VIEW, KEY_ALLOC_NOT_IN_QUOTA, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (IS_ERR(authkey)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ret = PTR_ERR(authkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) goto error_free_rka;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /* construct the auth key */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) ret = key_instantiate_and_link(authkey, rka, 0, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) goto error_put_authkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) kleave(" = {%d,%d}", authkey->serial, refcount_read(&authkey->usage));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return authkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) error_put_authkey:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) key_put(authkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) error_free_rka:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) free_request_key_auth(rka);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) kleave("= %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * Search the current process's keyrings for the authorisation key for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * instantiation of a key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) struct key *key_get_instantiation_authkey(key_serial_t target_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) char description[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct keyring_search_context ctx = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) .index_key.type = &key_type_request_key_auth,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) .index_key.description = description,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) .cred = current_cred(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) .match_data.cmp = key_default_cmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) .match_data.raw_data = description,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) .match_data.lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) .flags = (KEYRING_SEARCH_DO_STATE_CHECK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) KEYRING_SEARCH_RECURSE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct key *authkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) key_ref_t authkey_ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) ctx.index_key.desc_len = sprintf(description, "%x", target_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) authkey_ref = search_process_keyrings_rcu(&ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (IS_ERR(authkey_ref)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) authkey = ERR_CAST(authkey_ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (authkey == ERR_PTR(-EAGAIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) authkey = ERR_PTR(-ENOKEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) authkey = key_ref_to_ptr(authkey_ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (test_bit(KEY_FLAG_REVOKED, &authkey->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) key_put(authkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) authkey = ERR_PTR(-EKEYREVOKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return authkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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